diff options
23 files changed, 1991 insertions, 300 deletions
diff --git a/html/baremetal/102keyboard.subx.html b/html/baremetal/102keyboard.subx.html new file mode 100644 index 00000000..f841e696 --- /dev/null +++ b/html/baremetal/102keyboard.subx.html @@ -0,0 +1,102 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<title>Mu - baremetal/102keyboard.subx</title> +<meta name="Generator" content="Vim/8.1"> +<meta name="plugin-version" content="vim8.1_v1"> +<meta name="syntax" content="none"> +<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> +<meta name="colorscheme" content="minimal-light"> +<style type="text/css"> +<!-- +pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; } +body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; } +a { color:inherit; } +* { font-size:12pt; font-size: 1em; } +.subxComment { color: #005faf; } +.LineNr { } +.subxS1Comment { color: #0000af; } +.subxFunction { color: #af5f00; text-decoration: underline; } +.Constant { color: #008787; } +--> +</style> + +<script type='text/javascript'> +<!-- + +/* function to open any folds containing a jumped-to line before jumping to it */ +function JumpToLine() +{ + var lineNum; + lineNum = window.location.hash; + lineNum = lineNum.substr(1); /* strip off '#' */ + + if (lineNum.indexOf('L') == -1) { + lineNum = 'L'+lineNum; + } + var lineElem = document.getElementById(lineNum); + /* Always jump to new location even if the line was hidden inside a fold, or + * we corrected the raw number to a line ID. + */ + if (lineElem) { + lineElem.scrollIntoView(true); + } + return true; +} +if ('onhashchange' in window) { + window.onhashchange = JumpToLine; +} + +--> +</script> +</head> +<body onload='JumpToLine();'> +<a href='https://github.com/akkartik/mu/blob/main/baremetal/102keyboard.subx'>https://github.com/akkartik/mu/blob/main/baremetal/102keyboard.subx</a> +<pre id='vimCodeElement'> +<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># check keyboard for a key</span> +<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># return 0 on no keypress or unrecognized key</span> +<span id="L3" class="LineNr"> 3 </span><span class="subxFunction">read-key</span>: <span class="subxComment"># kbd: (addr keyboard) -> result/eax: byte</span> +<span id="L4" class="LineNr"> 4 </span> <span class="subxS1Comment"># . prologue</span> +<span id="L5" class="LineNr"> 5 </span> 55/push-ebp +<span id="L6" class="LineNr"> 6 </span> 89/<- %ebp 4/r32/esp +<span id="L7" class="LineNr"> 7 </span> <span class="subxS1Comment"># . save registers</span> +<span id="L8" class="LineNr"> 8 </span> 51/push-ecx +<span id="L9" class="LineNr"> 9 </span> <span class="subxComment"># result = 0</span> +<span id="L10" class="LineNr">10 </span> b8/copy-to-eax 0/imm32 +<span id="L11" class="LineNr">11 </span> <span class="subxComment"># ecx = keyboard</span> +<span id="L12" class="LineNr">12 </span> 8b/-> *(ebp+8) 1/r32/ecx +<span id="L13" class="LineNr">13 </span> 81 7/subop/compare %ecx 0/imm32 +<span id="L14" class="LineNr">14 </span> { +<span id="L15" class="LineNr">15 </span> 75/jump-if-!= <span class="Constant">break</span>/disp8 +<span id="L16" class="LineNr">16 </span> <span class="subxComment"># var read/ecx: byte = keyboard buffer's read index</span> +<span id="L17" class="LineNr">17 </span> 8b/-> *0x7dcc 1/r32/CL <span class="subxComment"># keyboard-buffer-read</span> +<span id="L18" class="LineNr">18 </span> <span class="subxComment"># var next-key/eax: byte = *(keyboard buffer + ecx)</span> +<span id="L19" class="LineNr">19 </span> 8a/byte-> *(ecx+0x7dd0) 0/r32/AL <span class="subxComment"># keyboard-buffer-data</span> +<span id="L20" class="LineNr">20 </span> <span class="subxComment"># if (next-key != 0) lock and remove from keyboard-buffer</span> +<span id="L21" class="LineNr">21 </span> 81 7/subop/compare %eax 0/imm32 +<span id="L22" class="LineNr">22 </span> { +<span id="L23" class="LineNr">23 </span> 74/jump-if-= <span class="Constant">break</span>/disp8 +<span id="L24" class="LineNr">24 </span> <span class="subxComment"># TODO: add some instructions in this block to SubX if we ever want to</span> +<span id="L25" class="LineNr">25 </span> <span class="subxComment"># use bootstrap on baremetal programs</span> +<span id="L26" class="LineNr">26 </span> fa/disable-interrupts +<span id="L27" class="LineNr">27 </span> c6 0/subop/copy-byte *(ecx+0x7dd0) 0/imm8 +<span id="L28" class="LineNr">28 </span> ff 0/subop/increment *0x7dcc <span class="subxComment"># keyboard-buffer-read</span> +<span id="L29" class="LineNr">29 </span> 81 4/subop/and *0x7dcc 0xf/imm32 <span class="subxComment"># keyboard-buffer-read</span> +<span id="L30" class="LineNr">30 </span> fb/enable-interrupts +<span id="L31" class="LineNr">31 </span> } +<span id="L32" class="LineNr">32 </span> <span class="subxComment"># return</span> +<span id="L33" class="LineNr">33 </span> eb $read-key:end/disp8 +<span id="L34" class="LineNr">34 </span> } +<span id="L35" class="LineNr">35 </span> <span class="subxComment"># TODO: fake keyboard</span> +<span id="L36" class="LineNr">36 </span><span class="Constant">$read-key:end</span>: +<span id="L37" class="LineNr">37 </span> <span class="subxS1Comment"># . restore registers</span> +<span id="L38" class="LineNr">38 </span> 59/pop-to-ecx +<span id="L39" class="LineNr">39 </span> <span class="subxS1Comment"># . epilogue</span> +<span id="L40" class="LineNr">40 </span> 89/<- %esp 5/r32/ebp +<span id="L41" class="LineNr">41 </span> 5d/pop-to-ebp +<span id="L42" class="LineNr">42 </span> c3/return +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> diff --git a/html/baremetal/103grapheme.subx.html b/html/baremetal/103grapheme.subx.html new file mode 100644 index 00000000..b34168d6 --- /dev/null +++ b/html/baremetal/103grapheme.subx.html @@ -0,0 +1,130 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<title>Mu - baremetal/103grapheme.subx</title> +<meta name="Generator" content="Vim/8.1"> +<meta name="plugin-version" content="vim8.1_v1"> +<meta name="syntax" content="none"> +<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> +<meta name="colorscheme" content="minimal-light"> +<style type="text/css"> +<!-- +pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; } +body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; } +a { color:inherit; } +* { font-size:12pt; font-size: 1em; } +.subxComment { color: #005faf; } +.LineNr { } +.subxS1Comment { color: #0000af; } +.subxFunction { color: #af5f00; text-decoration: underline; } +.Constant { color: #008787; } +--> +</style> + +<script type='text/javascript'> +<!-- + +/* function to open any folds containing a jumped-to line before jumping to it */ +function JumpToLine() +{ + var lineNum; + lineNum = window.location.hash; + lineNum = lineNum.substr(1); /* strip off '#' */ + + if (lineNum.indexOf('L') == -1) { + lineNum = 'L'+lineNum; + } + var lineElem = document.getElementById(lineNum); + /* Always jump to new location even if the line was hidden inside a fold, or + * we corrected the raw number to a line ID. + */ + if (lineElem) { + lineElem.scrollIntoView(true); + } + return true; +} +if ('onhashchange' in window) { + window.onhashchange = JumpToLine; +} + +--> +</script> +</head> +<body onload='JumpToLine();'> +<a href='https://github.com/akkartik/mu/blob/main/baremetal/103grapheme.subx'>https://github.com/akkartik/mu/blob/main/baremetal/103grapheme.subx</a> +<pre id='vimCodeElement'> +<span id="L1" class="LineNr"> 1 </span><span class="subxFunction">draw-grapheme</span>: <span class="subxComment"># screen: (addr screen), g: grapheme, x: int, y: int, color: int</span> +<span id="L2" class="LineNr"> 2 </span> <span class="subxS1Comment"># . prologue</span> +<span id="L3" class="LineNr"> 3 </span> 55/push-ebp +<span id="L4" class="LineNr"> 4 </span> 89/<- %ebp 4/r32/esp +<span id="L5" class="LineNr"> 5 </span> <span class="subxS1Comment"># . save registers</span> +<span id="L6" class="LineNr"> 6 </span> 50/push-eax +<span id="L7" class="LineNr"> 7 </span> 51/push-ecx +<span id="L8" class="LineNr"> 8 </span> 52/push-edx +<span id="L9" class="LineNr"> 9 </span> 53/push-ebx +<span id="L10" class="LineNr">10 </span> 56/push-esi +<span id="L11" class="LineNr">11 </span> <span class="subxComment"># var letter-bitmap/esi = font[g]</span> +<span id="L12" class="LineNr">12 </span> 8b/-> *(ebp+0xc) 6/r32/esi +<span id="L13" class="LineNr">13 </span> c1 4/subop/shift-left %esi 4/imm8 +<span id="L14" class="LineNr">14 </span> 8d/copy-address *(esi+0x8800) 6/r32/esi <span class="subxComment"># font-start</span> +<span id="L15" class="LineNr">15 </span> <span class="subxComment"># if (letter-bitmap >= 0x9000) return # characters beyond ASCII currently not supported</span> +<span id="L16" class="LineNr">16 </span> 81 7/subop/compare %esi 0x9000/imm32 +<span id="L17" class="LineNr">17 </span> 7d/jump-if->= $draw-grapheme:end/disp8 +<span id="L18" class="LineNr">18 </span> <span class="subxComment"># edx = y</span> +<span id="L19" class="LineNr">19 </span> 8b/-> *(ebp+0x14) 2/r32/edx +<span id="L20" class="LineNr">20 </span> <span class="subxComment"># var ymax/ebx: int = y + 16</span> +<span id="L21" class="LineNr">21 </span> 8b/-> *(ebp+0x14) 3/r32/ebx +<span id="L22" class="LineNr">22 </span> 81 0/subop/add %ebx 0x10/imm32 +<span id="L23" class="LineNr">23 </span> { +<span id="L24" class="LineNr">24 </span> <span class="subxComment"># if (y >= ymax) break</span> +<span id="L25" class="LineNr">25 </span> 39/compare %edx 3/r32/ebx +<span id="L26" class="LineNr">26 </span> 7d/jump-if->= <span class="Constant">break</span>/disp8 +<span id="L27" class="LineNr">27 </span> <span class="subxComment"># eax = x + 7</span> +<span id="L28" class="LineNr">28 </span> 8b/-> *(ebp+0x10) 0/r32/eax +<span id="L29" class="LineNr">29 </span> 81 0/subop/add %eax 7/imm32 +<span id="L30" class="LineNr">30 </span> <span class="subxComment"># var xmin/ecx: int = x</span> +<span id="L31" class="LineNr">31 </span> 8b/-> *(ebp+0x10) 1/r32/ecx +<span id="L32" class="LineNr">32 </span> <span class="subxComment"># var row-bitmap/ebx: int = *letter-bitmap</span> +<span id="L33" class="LineNr">33 </span> 53/push-ebx +<span id="L34" class="LineNr">34 </span> 8b/-> *esi 3/r32/ebx +<span id="L35" class="LineNr">35 </span> { +<span id="L36" class="LineNr">36 </span> <span class="subxComment"># if (x < xmin) break</span> +<span id="L37" class="LineNr">37 </span> 39/compare %eax 1/r32/ecx +<span id="L38" class="LineNr">38 </span> 7c/jump-if-< <span class="Constant">break</span>/disp8 +<span id="L39" class="LineNr">39 </span> <span class="subxComment"># shift LSB from row-bitmap into carry flag (CF)</span> +<span id="L40" class="LineNr">40 </span> c1 5/subop/shift-right-logical %ebx 1/imm8 +<span id="L41" class="LineNr">41 </span> <span class="subxComment"># if LSB, draw a pixel</span> +<span id="L42" class="LineNr">42 </span> { +<span id="L43" class="LineNr">43 </span> 73/jump-if-not-CF <span class="Constant">break</span>/disp8 +<span id="L44" class="LineNr">44 </span> (<a href='101screen.subx.html#L3'>pixel</a> *(ebp+8) %eax %edx *(ebp+0x18)) +<span id="L45" class="LineNr">45 </span> } +<span id="L46" class="LineNr">46 </span> <span class="subxComment"># --x</span> +<span id="L47" class="LineNr">47 </span> 48/decrement-eax +<span id="L48" class="LineNr">48 </span> <span class="subxComment">#</span> +<span id="L49" class="LineNr">49 </span> eb/jump <span class="Constant">loop</span>/disp8 +<span id="L50" class="LineNr">50 </span> } +<span id="L51" class="LineNr">51 </span> <span class="subxComment"># reclaim row-bitmap</span> +<span id="L52" class="LineNr">52 </span> 5b/pop-to-ebx +<span id="L53" class="LineNr">53 </span> <span class="subxComment"># ++y</span> +<span id="L54" class="LineNr">54 </span> 42/increment-edx +<span id="L55" class="LineNr">55 </span> <span class="subxComment"># next bitmap row</span> +<span id="L56" class="LineNr">56 </span> 46/increment-esi +<span id="L57" class="LineNr">57 </span> <span class="subxComment">#</span> +<span id="L58" class="LineNr">58 </span> eb/jump <span class="Constant">loop</span>/disp8 +<span id="L59" class="LineNr">59 </span> } +<span id="L60" class="LineNr">60 </span><span class="Constant">$draw-grapheme:end</span>: +<span id="L61" class="LineNr">61 </span> <span class="subxS1Comment"># . restore registers</span> +<span id="L62" class="LineNr">62 </span> 5e/pop-to-esi +<span id="L63" class="LineNr">63 </span> 5b/pop-to-ebx +<span id="L64" class="LineNr">64 </span> 5a/pop-to-edx +<span id="L65" class="LineNr">65 </span> 59/pop-to-ecx +<span id="L66" class="LineNr">66 </span> 58/pop-to-eax +<span id="L67" class="LineNr">67 </span> <span class="subxS1Comment"># . epilogue</span> +<span id="L68" class="LineNr">68 </span> 89/<- %esp 5/r32/ebp +<span id="L69" class="LineNr">69 </span> 5d/pop-to-ebp +<span id="L70" class="LineNr">70 </span> c3/return +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> diff --git a/html/baremetal/107trace.subx.html b/html/baremetal/107trace.subx.html new file mode 100644 index 00000000..db7cdd65 --- /dev/null +++ b/html/baremetal/107trace.subx.html @@ -0,0 +1,149 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<title>Mu - baremetal/107trace.subx</title> +<meta name="Generator" content="Vim/8.1"> +<meta name="plugin-version" content="vim8.1_v1"> +<meta name="syntax" content="none"> +<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> +<meta name="colorscheme" content="minimal-light"> +<style type="text/css"> +<!-- +pre { font-family: monospace; color: #000000; background-color: #c6c6c6; } +body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; } +a { color:inherit; } +* { font-size:12pt; font-size: 1em; } +.subxComment { color: #005faf; } +.subxS1Comment { color: #0000af; } +.subxS2Comment { color: #8a8a8a; } +.LineNr { } +.Constant { color: #008787; } +.subxMinorFunction { color: #875f5f; } +.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; } +--> +</style> + +<script type='text/javascript'> +<!-- + +/* function to open any folds containing a jumped-to line before jumping to it */ +function JumpToLine() +{ + var lineNum; + lineNum = window.location.hash; + lineNum = lineNum.substr(1); /* strip off '#' */ + + if (lineNum.indexOf('L') == -1) { + lineNum = 'L'+lineNum; + } + var lineElem = document.getElementById(lineNum); + /* Always jump to new location even if the line was hidden inside a fold, or + * we corrected the raw number to a line ID. + */ + if (lineElem) { + lineElem.scrollIntoView(true); + } + return true; +} +if ('onhashchange' in window) { + window.onhashchange = JumpToLine; +} + +--> +</script> +</head> +<body onload='JumpToLine();'> +<a href='https://github.com/akkartik/mu/blob/main/baremetal/107trace.subx'>https://github.com/akkartik/mu/blob/main/baremetal/107trace.subx</a> +<pre id='vimCodeElement'> +<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># instruction effective address register displacement immediate</span> +<span id="L2" class="LineNr"> 2 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span> +<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span> +<span id="L4" class="LineNr"> 4 </span> +<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># 3-argument variant of _append</span> +<span id="L6" class="LineNr"> 6 </span><span class="subxMinorFunction">_append-3</span>: <span class="subxComment"># out: (addr byte), outend: (addr byte), s: (addr array byte) -> num_bytes_appended/eax</span> +<span id="L7" class="LineNr"> 7 </span> <span class="subxS1Comment"># . prologue</span> +<span id="L8" class="LineNr"> 8 </span> 55/push-ebp +<span id="L9" class="LineNr"> 9 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span> +<span id="L10" class="LineNr">10 </span> <span class="subxS1Comment"># . save registers</span> +<span id="L11" class="LineNr">11 </span> 51/push-ecx +<span id="L12" class="LineNr">12 </span> <span class="subxComment"># eax = _append-4(out, outend, &s->data[0], &s->data[s->size])</span> +<span id="L13" class="LineNr">13 </span> <span class="subxS2Comment"># . . push &s->data[s->size]</span> +<span id="L14" class="LineNr">14 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to eax</span> +<span id="L15" class="LineNr">15 </span> 8b/copy 0/mod/indirect 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *eax to ecx</span> +<span id="L16" class="LineNr">16 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax+ecx+4 to ecx</span> +<span id="L17" class="LineNr">17 </span> 51/push-ecx +<span id="L18" class="LineNr">18 </span> <span class="subxS2Comment"># . . push &s->data[0]</span> +<span id="L19" class="LineNr">19 </span> 8d/copy-address 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax+4 to ecx</span> +<span id="L20" class="LineNr">20 </span> 51/push-ecx +<span id="L21" class="LineNr">21 </span> <span class="subxS2Comment"># . . push outend</span> +<span id="L22" class="LineNr">22 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span> +<span id="L23" class="LineNr">23 </span> <span class="subxS2Comment"># . . push out</span> +<span id="L24" class="LineNr">24 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> +<span id="L25" class="LineNr">25 </span> <span class="subxS2Comment"># . . call</span> +<span id="L26" class="LineNr">26 </span> e8/call <a href='107trace.subx.html#L38'>_append-4</a>/disp32 +<span id="L27" class="LineNr">27 </span> <span class="subxS2Comment"># . . discard args</span> +<span id="L28" class="LineNr">28 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span> +<span id="L29" class="LineNr">29 </span><span class="Constant">$_append-3:end</span>: +<span id="L30" class="LineNr">30 </span> <span class="subxS1Comment"># . restore registers</span> +<span id="L31" class="LineNr">31 </span> 59/pop-to-ecx +<span id="L32" class="LineNr">32 </span> <span class="subxS1Comment"># . epilogue</span> +<span id="L33" class="LineNr">33 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span> +<span id="L34" class="LineNr">34 </span> 5d/pop-to-ebp +<span id="L35" class="LineNr">35 </span> c3/return +<span id="L36" class="LineNr">36 </span> +<span id="L37" class="LineNr">37 </span><span class="subxComment"># 4-argument variant of _append</span> +<span id="L38" class="LineNr">38 </span><span class="subxMinorFunction">_append-4</span>: <span class="subxComment"># out: (addr byte), outend: (addr byte), in: (addr byte), inend: (addr byte) -> num_bytes_appended/eax: int</span> +<span id="L39" class="LineNr">39 </span> <span class="subxS1Comment"># . prologue</span> +<span id="L40" class="LineNr">40 </span> 55/push-ebp +<span id="L41" class="LineNr">41 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span> +<span id="L42" class="LineNr">42 </span> <span class="subxS1Comment"># . save registers</span> +<span id="L43" class="LineNr">43 </span> 51/push-ecx +<span id="L44" class="LineNr">44 </span> 52/push-edx +<span id="L45" class="LineNr">45 </span> 53/push-ebx +<span id="L46" class="LineNr">46 </span> 56/push-esi +<span id="L47" class="LineNr">47 </span> 57/push-edi +<span id="L48" class="LineNr">48 </span> <span class="subxComment"># num_bytes_appended = 0</span> +<span id="L49" class="LineNr">49 </span> b8/copy-to-eax 0/imm32 +<span id="L50" class="LineNr">50 </span> <span class="subxComment"># edi = out</span> +<span id="L51" class="LineNr">51 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to edi</span> +<span id="L52" class="LineNr">52 </span> <span class="subxComment"># edx = outend</span> +<span id="L53" class="LineNr">53 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to edx</span> +<span id="L54" class="LineNr">54 </span> <span class="subxComment"># esi = in</span> +<span id="L55" class="LineNr">55 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to esi</span> +<span id="L56" class="LineNr">56 </span> <span class="subxComment"># ecx = inend</span> +<span id="L57" class="LineNr">57 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0x14/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+20) to ecx</span> +<span id="L58" class="LineNr">58 </span><span class="Constant">$_append-4:loop</span>: +<span id="L59" class="LineNr">59 </span> <span class="subxComment"># if (in >= inend) break</span> +<span id="L60" class="LineNr">60 </span> 39/compare 3/mod/direct 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare esi with ecx</span> +<span id="L61" class="LineNr">61 </span> 73/jump-if-addr>= $_append-4:end/disp8 +<span id="L62" class="LineNr">62 </span> <span class="subxComment"># if (out >= outend) abort # just to catch test failures fast</span> +<span id="L63" class="LineNr">63 </span> 39/compare 3/mod/direct 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare edi with edx</span> +<span id="L64" class="LineNr">64 </span> 73/jump-if-addr>= $_append-4:end/disp8 <span class="subxComment"># TODO: abort</span> +<span id="L65" class="LineNr">65 </span> <span class="subxComment"># *out = *in</span> +<span id="L66" class="LineNr">66 </span> 8a/copy-byte 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/BL <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy byte at *esi to BL</span> +<span id="L67" class="LineNr">67 </span> 88/copy-byte 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/BL <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy byte at BL to *edi</span> +<span id="L68" class="LineNr">68 </span> <span class="subxComment"># ++num_bytes_appended</span> +<span id="L69" class="LineNr">69 </span> 40/increment-eax +<span id="L70" class="LineNr">70 </span> <span class="subxComment"># ++in</span> +<span id="L71" class="LineNr">71 </span> 46/increment-esi +<span id="L72" class="LineNr">72 </span> <span class="subxComment"># ++out</span> +<span id="L73" class="LineNr">73 </span> 47/increment-edi +<span id="L74" class="LineNr">74 </span> eb/jump $_append-4:<span class="Constant">loop</span>/disp8 +<span id="L75" class="LineNr">75 </span><span class="Constant">$_append-4:end</span>: +<span id="L76" class="LineNr">76 </span> <span class="subxS1Comment"># . restore registers</span> +<span id="L77" class="LineNr">77 </span> 5f/pop-to-edi +<span id="L78" class="LineNr">78 </span> 5e/pop-to-esi +<span id="L79" class="LineNr">79 </span> 5b/pop-to-ebx +<span id="L80" class="LineNr">80 </span> 5a/pop-to-edx +<span id="L81" class="LineNr">81 </span> 59/pop-to-ecx +<span id="L82" class="LineNr">82 </span> <span class="subxS1Comment"># . epilogue</span> +<span id="L83" class="LineNr">83 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span> +<span id="L84" class="LineNr">84 </span> 5d/pop-to-ebp +<span id="L85" class="LineNr">85 </span> c3/return +<span id="L86" class="LineNr">86 </span> +<span id="L87" class="LineNr">87 </span><span class="subxS2Comment"># . . vim:nowrap:textwidth=0</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> diff --git a/html/baremetal/108write.subx.html b/html/baremetal/108write.subx.html new file mode 100644 index 00000000..68c65e6d --- /dev/null +++ b/html/baremetal/108write.subx.html @@ -0,0 +1,115 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<title>Mu - baremetal/108write.subx</title> +<meta name="Generator" content="Vim/8.1"> +<meta name="plugin-version" content="vim8.1_v1"> +<meta name="syntax" content="none"> +<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> +<meta name="colorscheme" content="minimal-light"> +<style type="text/css"> +<!-- +pre { font-family: monospace; color: #000000; background-color: #c6c6c6; } +body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; } +a { color:inherit; } +* { font-size:12pt; font-size: 1em; } +.subxComment { color: #005faf; } +.subxS1Comment { color: #0000af; } +.subxS2Comment { color: #8a8a8a; } +.LineNr { } +.subxFunction { color: #af5f00; text-decoration: underline; } +.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; } +.Constant { color: #008787; } +--> +</style> + +<script type='text/javascript'> +<!-- + +/* function to open any folds containing a jumped-to line before jumping to it */ +function JumpToLine() +{ + var lineNum; + lineNum = window.location.hash; + lineNum = lineNum.substr(1); /* strip off '#' */ + + if (lineNum.indexOf('L') == -1) { + lineNum = 'L'+lineNum; + } + var lineElem = document.getElementById(lineNum); + /* Always jump to new location even if the line was hidden inside a fold, or + * we corrected the raw number to a line ID. + */ + if (lineElem) { + lineElem.scrollIntoView(true); + } + return true; +} +if ('onhashchange' in window) { + window.onhashchange = JumpToLine; +} + +--> +</script> +</head> +<body onload='JumpToLine();'> +<a href='https://github.com/akkartik/mu/blob/main/baremetal/108write.subx'>https://github.com/akkartik/mu/blob/main/baremetal/108write.subx</a> +<pre id='vimCodeElement'> +<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># instruction effective address register displacement immediate</span> +<span id="L2" class="LineNr"> 2 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span> +<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span> +<span id="L4" class="LineNr"> 4 </span> +<span id="L5" class="LineNr"> 5 </span><span class="subxFunction">write</span>: <span class="subxComment"># f: (addr stream byte), s: (addr array byte)</span> +<span id="L6" class="LineNr"> 6 </span> <span class="subxS1Comment"># . prologue</span> +<span id="L7" class="LineNr"> 7 </span> 55/push-ebp +<span id="L8" class="LineNr"> 8 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span> +<span id="L9" class="LineNr"> 9 </span> <span class="subxComment"># if (s == 0) return</span> +<span id="L10" class="LineNr">10 </span> 81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 0/imm32 <span class="subxComment"># compare *(ebp+12)</span> +<span id="L11" class="LineNr">11 </span> 74/jump-if-= $write:end/disp8 +<span id="L12" class="LineNr">12 </span> <span class="subxComment"># TODO: write to file</span> +<span id="L13" class="LineNr">13 </span> <span class="subxComment"># otherwise, treat 'f' as a stream to append to</span> +<span id="L14" class="LineNr">14 </span> <span class="subxS1Comment"># . save registers</span> +<span id="L15" class="LineNr">15 </span> 50/push-eax +<span id="L16" class="LineNr">16 </span> 51/push-ecx +<span id="L17" class="LineNr">17 </span> 52/push-edx +<span id="L18" class="LineNr">18 </span> 53/push-ebx +<span id="L19" class="LineNr">19 </span> <span class="subxComment"># ecx = f</span> +<span id="L20" class="LineNr">20 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to ecx</span> +<span id="L21" class="LineNr">21 </span> <span class="subxComment"># edx = f->write</span> +<span id="L22" class="LineNr">22 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to edx</span> +<span id="L23" class="LineNr">23 </span> <span class="subxComment"># ebx = f->size</span> +<span id="L24" class="LineNr">24 </span> 8b/copy elimiter">(</span>fin<span class="Delimiter">))</span> <span class="Delimiter">{</span> <span id="L19" class="LineNr"> 19 </span> <span class="Normal">uint32_t</span> addr = <span class="Constant">0</span><span class="Delimiter">;</span> <span id="L20" class="LineNr"> 20 </span> fin >> addr<span class="Delimiter">;</span> <span id="L21" class="LineNr"> 21 </span> string <a href='011run.cc.html#L111'>name</a><span class="Delimiter">;</span> <span id="L22" class="LineNr"> 22 </span> fin >> <a href='011run.cc.html#L111'>name</a><span class="Delimiter">;</span> <span id="L23" class="LineNr"> 23 </span> <a href='001help.cc.html#L229'>put</a><span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> addr<span class="Delimiter">,</span> <a href='011run.cc.html#L111'>name</a><span class="Delimiter">);</span> <span id="L24" class="LineNr"> 24 </span> <span class="Delimiter">}</span> <span id="L25" class="LineNr"> 25 </span><span class="Delimiter">}</span> <span id="L26" class="LineNr"> 26 </span> <span id="L27" class="LineNr"> 27 </span><span class="Normal">void</span> <a href='039debug.cc.html#L27'>load_source_lines</a><span class="Delimiter">()</span> <span class="Delimiter">{</span> <span id="L28" class="LineNr"> 28 </span> ifstream fin<span class="Delimiter">(</span><span class="Constant">"source_lines"</span><span class="Delimiter">);</span> <span id="L29" class="LineNr"> 29 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>fin<span class="Delimiter">.</span>fail<span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span id="L30" class="LineNr"> 30 </span> fin >> std::hex<span class="Delimiter">;</span> <span id="L31" class="LineNr"> 31 </span> <span class="Normal">while</span> <span class="Delimiter">(</span><a href='001help.cc.html#L251'>has_data</a><span class="Delimiter">(</span>fin<span class="Delimiter">))</span> <span class="Delimiter">{</span> <span id="L32" class="LineNr"> 32 </span> <span class="Normal">uint32_t</span> addr = <span class="Constant">0</span><span class="Delimiter">;</span> <span id="L33" class="LineNr"> 33 </span> fin >> addr<span class="Delimiter">;</span> <span id="L34" class="LineNr"> 34 </span> string <a href='011run.cc.html#L121'>line</a><span class="Delimiter">;</span> <span id="L35" class="LineNr"> 35 </span> getline<span class="Delimiter">(</span>fin<span class="Delimiter">,</span> <a href='011run.cc.html#L121'>line</a><span class="Delimiter">);</span> <span id="L36" class="LineNr"> 36 </span> <a href='001help.cc.html#L229'>put</a><span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L9'>Source_line</a></span><span class="Delimiter">,</span> addr<span class="Delimiter">,</span> <a href='039debug.cc.html#L113'>hacky_squeeze_out_whitespace</a><span class="Delimiter">(</span><a href='011run.cc.html#L121'>line</a><span class="Delimiter">));</span> <span id="L37" class="LineNr"> 37 </span> <span class="Delimiter">}</span> <span id="L38" class="LineNr"> 38 </span><span class="Delimiter">}</span> <span id="L39" class="LineNr"> 39 </span> <span id="L40" class="LineNr"> 40 </span><span class="Delimiter">:(after "Run One Instruction")</span> <span id="L41" class="LineNr"> 41 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L233'>contains_key</a><span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">))</span> <span id="L42" class="LineNr"> 42 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Special">Callstack_depth</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"== label "</span> << get<span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">)</span> << end<span class="Delimiter">();</span> <span id="L43" class="LineNr"> 43 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L233'>contains_key</a><span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L9'>Source_line</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">))</span> <span id="L44" class="LineNr"> 44 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Special">Callstack_depth</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"inst: "</span> << get<span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L9'>Source_line</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">)</span> << end<span class="Delimiter">();</span> <span id="L45" class="LineNr"> 45 </span><span class="Normal">else</span> <span id="L46" class="LineNr"> 46 </span> <span class="Comment">// no source line info; do what you can</span> <span id="L47" class="LineNr"> 47 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Special">Callstack_depth</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"inst: "</span> << <a href='039debug.cc.html#L50'>debug_info</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">)</span> << end<span class="Delimiter">();</span> <span id="L48" class="LineNr"> 48 </span> <span id="L49" class="LineNr"> 49 </span><span class="Delimiter">:(code)</span> <span id="L50" class="LineNr"> 50 </span>string <a href='039debug.cc.html#L50'>debug_info</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> inst_address<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L51" class="LineNr"> 51 </span> <span class="Normal">uint8_t</span> op = <a href='010---vm.cc.html#L165'>read_mem_u8</a><span class="Delimiter">(</span>inst_address<span class="Delimiter">);</span> <span id="L52" class="LineNr"> 52 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>op != <span class="Constant">0xe8</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L53" class="LineNr"> 53 </span> ostringstream out<span class="Delimiter">;</span> <span id="L54" class="LineNr"> 54 </span> out << <a href='010---vm.cc.html#L394'>HEXBYTE</a> << <a href='010---vm.cc.html#L397'>NUM</a><span class="Delimiter">(</span>op<span class="Delimiter">);</span> <span id="L55" class="LineNr"> 55 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span> <span id="L56" class="LineNr"> 56 </span> <span class="Delimiter">}</span> <span id="L57" class="LineNr"> 57 </span> <span class="Normal">int32_t</span> offset = <a href='010---vm.cc.html#L176'>read_mem_i32</a><span class="Delimiter">(</span>inst_address+<span class="Comment">/*</span><span class="Comment">skip op</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">);</span> <span id="L58" class="LineNr"> 58 </span> <span class="Normal">uint32_t</span> next_eip = inst_address+<span class="Comment">/*</span><span class="Comment">inst length</span><span class="Comment">*/</span><span class="Constant">5</span>+offset<span class="Delimiter">;</span> <span id="L59" class="LineNr"> 59 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L233'>contains_key</a><span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> next_eip<span class="Delimiter">))</span> <span id="L60" class="LineNr"> 60 </span> <span class="Identifier">return</span> <span class="Constant">"e8/call "</span>+get<span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> next_eip<span class="Delimiter">);</span> <span id="L61" class="LineNr"> 61 </span> ostringstream out<span class="Delimiter">;</span> <span id="L62" class="LineNr"> 62 </span> out << <span class="Constant">"e8/call 0x"</span> << <a href='010---vm.cc.html#L395'>HEXWORD</a> << next_eip<span class="Delimiter">;</span> <span id="L63" class="LineNr"> 63 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span> <span id="L64" class="LineNr"> 64 </span><span class="Delimiter">}</span> <span id="L65" class="LineNr"> 65 </span> <span id="L66" class="LineNr"> 66 </span><span class="Comment">//: If a label starts with '$watch-', make a note of the effective address</span> <span id="L67" class="LineNr"> 67 </span><span class="Comment">//: computed by the next instruction. Start dumping out its contents to the</span> <span id="L68" class="LineNr"> 68 </span><span class="Comment">//: trace after every subsequent instruction.</span> <span id="L69" class="LineNr"> 69 </span> <span id="L70" class="LineNr"> 70 </span><span class="Delimiter">:(after "Run One Instruction")</span> <span id="L71" class="LineNr"> 71 </span><a href='039debug.cc.html#L77'>dump_watch_points</a><span class="Delimiter">();</span> <span id="L72" class="LineNr"> 72 </span><span class="Delimiter">:(before "End Globals")</span> <span id="L73" class="LineNr"> 73 </span>map<string<span class="Delimiter">,</span> <span class="Normal">uint32_t</span>> <span class="Special"><a href='039debug.cc.html#L73'>Watch_points</a></span><span class="Delimiter">;</span> <span id="L74" class="LineNr"> 74 </span><span class="Delimiter">:(before "End Reset")</span> <span id="L75" class="LineNr"> 75 </span><span class="Special"><a href='039debug.cc.html#L73'>Watch_points</a></span><span class="Delimiter">.</span>clear<span class="Delimiter">();</span> <span id="L76" class="LineNr"> 76 </span><span class="Delimiter">:(code)</span> <span id="L77" class="LineNr"> 77 </span><span class="Normal">void</span> <a href='039debug.cc.html#L77'>dump_watch_points</a><span class="Delimiter">()</span> <span class="Delimiter">{</span> <span id="L78" class="LineNr"> 78 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L73'>Watch_points</a></span><span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span id="L79" class="LineNr"> 79 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Special">Callstack_depth</span><span class="Delimiter">,</span> <span class="Constant">"dbg"</span><span class="Delimiter">)</span> << <span class="Constant">"watch points:"</span> << end<span class="Delimiter">();</span> <span id="L80" class="LineNr"> 80 </span> <span class="Normal">for</span> <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> <span class="Normal">uint32_t</span>>::iterator p = <span class="Special"><a href='039debug.cc.html#L73'>Watch_points</a></span><span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != <span class="Special"><a href='039debug.cc.html#L73'>Watch_points</a></span><span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span id="L81" class="LineNr"> 81 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span><span class="Special">Callstack_depth</span><span class="Delimiter">,</span> <span class="Constant">"dbg"</span><span class="Delimiter">)</span> << <span class="Constant">" "</span> << p<span class="Delimiter">-></span>first << <span class="Constant">": "</span> << <a href='010---vm.cc.html#L395'>HEXWORD</a> << p<span class="Delimiter">-></span>second << <span class="Constant">" -> "</span> << <a href='010---vm.cc.html#L395'>HEXWORD</a> << <a href='010---vm.cc.html#L172'>read_mem_u32</a><span class="Delimiter">(</span>p<span class="Delimiter">-></span>second<span class="Delimiter">)</span> << end<span class="Delimiter">();</span> <span id="L82" class="LineNr"> 82 </span><span class="Delimiter">}</span> <span id="L83" class="LineNr"> 83 </span> <span id="L84" class="LineNr"> 84 </span><span class="Delimiter">:(before "End Globals")</span> <span id="L85" class="LineNr"> 85 </span>string <span class="Special">Watch_this_effective_address</span><span class="Delimiter">;</span> <span id="L86" class="LineNr"> 86 </span><span class="Delimiter">:(after "Run One Instruction")</span> <span id="L87" class="LineNr"> 87 </span><span class="Special">Watch_this_effective_address</span> = <span class="Constant">""</span><span class="Delimiter">;</span> <span id="L88" class="LineNr"> 88 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L233'>contains_key</a><span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">)</span> && <a href='001help.cc.html#L106'>starts_with</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">),</span> <span class="Constant">"$watch-"</span><span class="Delimiter">))</span> <span id="L89" class="LineNr"> 89 </span> <span class="Special">Watch_this_effective_address</span> = get<span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">);</span> <span id="L90" class="LineNr"> 90 </span><span class="Delimiter">:(after "Found <a href='013direct_addressing.cc.html#L101'>effective_address</a>(addr)")</span> <span id="L91" class="LineNr"> 91 </span><span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Watch_this_effective_address</span><span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span> <span id="L92" class="LineNr"> 92 </span> <a href='003trace.cc.html#L441'>dbg</a> << <span class="Constant">"now watching "</span> << <a href='010---vm.cc.html#L395'>HEXWORD</a> << addr << <span class="Constant">" for "</span> << <span class="Special">Watch_this_effective_address</span> << end<span class="Delimiter">();</span> <span id="L93" class="LineNr"> 93 </span> <a href='001help.cc.html#L229'>put</a><span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L73'>Watch_points</a></span><span class="Delimiter">,</span> <span class="Special">Watch_this_effective_address</span><span class="Delimiter">,</span> addr<span class="Delimiter">);</span> <span id="L94" class="LineNr"> 94 </span><span class="Delimiter">}</span> <span id="L95" class="LineNr"> 95 </span> <span id="L96" class="LineNr"> 96 </span><span class="Comment">//: Special label that dumps regions of memory.</span> <span id="L97" class="LineNr"> 97 </span><span class="Comment">//: Not a general mechanism; by the time you get here you're willing to hack</span> <span id="L98" class="LineNr"> 98 </span><span class="Comment">//: on the emulator.</span> <span id="L99" class="LineNr"> 99 </span><span class="Delimiter">:(after "Run One Instruction")</span> <span id="L100" class="LineNr">100 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L233'>contains_key</a><span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">)</span> && get<span class="Delimiter">(</span><span class="Special"><a href='039debug.cc.html#L8'>Symbol_name</a></span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L26'>EIP</a><span class="Delimiter">)</span> == <span class="Constant">"$dump-stream-at-EAX"</span><span class="Delimiter">)</span> <span id="L101" class="LineNr">101 </span> <a href='039debug.cc.html#L103'>dump_stream_at</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L25'>Reg</a></span>[EAX]<span class="Delimiter">.</span>u<span class="Delimiter">);</span> <span id="L102" class="LineNr">102 </span><span class="Delimiter">:(code)</span> <span id="L103" class="LineNr">103 </span><span class="Normal">void</span> <a href='039debug.cc.html#L103'>dump_stream_at</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> stream_start<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L104" class="LineNr">104 </span> <span class="Normal">int32_t</span> stream_length = <a href='010---vm.cc.html#L176'>read_mem_i32</a><span class="Delimiter">(</span>stream_start + <span class="Constant">8</span><span class="Delimiter">);</span> <span id="L105" class="LineNr">105 </span> <a href='003trace.cc.html#L441'>dbg</a> << <span class="Constant">"stream length: "</span> << std::dec << stream_length << end<span class="Delimiter">();</span> <span id="L106" class="LineNr">106 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < stream_length + <span class="Constant">12</span><span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span id="L107" class="LineNr">107 </span> <a href='003trace.cc.html#L441'>dbg</a> << <span class="Constant">"0x"</span> << <a href='010---vm.cc.html#L395'>HEXWORD</a> << <span class="Delimiter">(</span>stream_start+i<span class="Delimiter">)</span> << <span class="Constant">": "</span> << <a href='010---vm.cc.html#L394'>HEXBYTE</a> << <a href='010---vm.cc.html#L397'>NUM</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L165'>read_mem_u8</a><span class="Delimiter">(</span>stream_start+i<span class="Delimiter">))</span> << end<span class="Delimiter">();</span> <span id="L108" class="LineNr">108 </span><span class="Delimiter">}</span> <span id="L109" class="LineNr">109 </span> <span id="L110" class="LineNr">110 </span><span class="Comment">//: helpers</span> <span id="L111" class="LineNr">111 </span> <span id="L112" class="LineNr">112 </span><span class="Delimiter">:(code)</span> <span id="L113" class="LineNr">113 </span>string <a href='039debug.cc.html#L113'>hacky_squeeze_out_whitespace</a><span class="Delimiter">(</span><span class="Normal">const</span> string& s<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L114" class="LineNr">114 </span> <span class="Comment">// strip whitespace at start</span> <span id="L115" class="LineNr">115 </span> string::const_iterator first = s<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> <span id="L116" class="LineNr">116 </span> <span class="Normal">while</span> <span class="Delimiter">(</span>first != s<span class="Delimiter">.</span>end<span class="Delimiter">()</span> && isspace<span class="Delimiter">(</span>*first<span class="Delimiter">))</span> <span id="L117" class="LineNr">117 </span> ++first<span class="Delimiter">;</span> <span id="L118" class="LineNr">118 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>first == s<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">""</span><span class="Delimiter">;</span> <span id="L119" class="LineNr">119 </span> <span id="L120" class="LineNr">120 </span> <span class="Comment">// strip whitespace at end</span> <span id="L121" class="LineNr">121 </span> string::const_iterator last = --s<span class="Delimiter">.</span>end<span class="Delimiter">();</span> <span id="L122" class="LineNr">122 </span> <span class="Normal">while</span> <span class="Delimiter">(</span>last != s<span class="Delimiter">.</span>begin<span class="Delimiter">()</span> && isspace<span class="Delimiter">(</span>*last<span class="Delimiter">))</span> <span id="L123" class="LineNr">123 </span> --last<span class="Delimiter">;</span> <span id="L124" class="LineNr">124 </span> ++last<span class="Delimiter">;</span> <span id="L125" class="LineNr">125 </span> <span id="L126" class="LineNr">126 </span> <span class="Comment">// replace runs of spaces/dots with single space until comment or string</span> <span id="L127" class="LineNr">127 </span> <span class="Comment">// </span><span class="Todo">TODO</span><span class="Comment">:</span> <span id="L128" class="LineNr">128 </span> <span class="Comment">// leave alone dots not surrounded by whitespace</span> <span id="L129" class="LineNr">129 </span> <span class="Comment">// leave alone '#' within word</span> <span id="L130" class="LineNr">130 </span> <span class="Comment">// leave alone '"' within word</span> <span id="L131" class="LineNr">131 </span> <span class="Comment">// squeeze spaces after end of string</span> <span id="L132" class="LineNr">132 </span> ostringstream out<span class="Delimiter">;</span> <span id="L133" class="LineNr">133 </span> <span class="Normal">bool</span> previous_was_space = <span class="Constant">false</span><span class="Delimiter">;</span> <span id="L134" class="LineNr">134 </span> <span class="Normal">bool</span> in_comment_or_string = <span class="Constant">false</span><span class="Delimiter">;</span> <span id="L135" class="LineNr">135 </span> <span class="Normal">for</span> <span class="Delimiter">(</span>string::const_iterator curr = first<span class="Delimiter">;</span> curr != last<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span id="L136" class="LineNr">136 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>in_comment_or_string<span class="Delimiter">)</span> <span id="L137" class="LineNr">137 </span> out << *curr<span class="Delimiter">;</span> <span id="L138" class="LineNr">138 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>isspace<span class="Delimiter">(</span>*curr<span class="Delimiter">)</span> || *curr == <span class="Constant">'.'</span><span class="Delimiter">)</span> <span id="L139" class="LineNr">139 </span> previous_was_space = <span class="Constant">true</span><span class="Delimiter">;</span> <span id="L140" class="LineNr">140 </span> <span class="Normal">else</span> <span class="Delimiter">{</span> <span id="L141" class="LineNr">141 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>previous_was_space<span class="Delimiter">)</span> <span id="L142" class="LineNr">142 </span> out << <span class="Constant">' '</span><span class="Delimiter">;</span> <span id="L143" class="LineNr">143 </span> out << *curr<span class="Delimiter">;</span> <span id="L144" class="LineNr">144 </span> previous_was_space = <span class="Constant">false</span><span class="Delimiter">;</span> <span id="L145" class="LineNr">145 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>*curr == <span class="Constant">'#'</span> || *curr == <span class="Constant">'"'</span><span class="Delimiter">)</span> in_comment_or_string = <span class="Constant">true</span><span class="Delimiter">;</span> <span id="L146" class="LineNr">146 </span> <span class="Delimiter">}</span> <span id="L147" class="LineNr">147 </span> <span class="Delimiter">}</span> <span id="L148" class="LineNr">148 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span> <span id="L149" class="LineNr">149 </span><span class="Delimiter">}</span> </pre> </body> </html> <!-- vim: set foldmethod=manual : --> |